The sound column speaker refers to a column speaker composed of multiple speakers arranged and combined and connected in phase. Compared with traditional speakers, it has stronger sound directivity, smaller appearance, smaller footprint, and more in line with the simple style of modern homes. It is commonly found in home theaters, conference halls, shopping malls, stadiums, bars, restaurants, schools, etc.
Feature one: strong directivity in the vertical direction
The sound column speaker can be said to be a miniaturized and portable professional line array audio system. The directivity of the sound column is similar to that of a single speaker in the horizontal direction, but it is greatly improved in the vertical direction. It propagates in a wave shape in the horizontal direction, but has a strong directing characteristic in the vertical direction, forming a "plate" -like stereoscopic radiation effect.
The sound column is installed near the stage entrance, and this "sound disk" is pointed at the audience. The sound beam radiates to the back of the auditorium with strong sound energy. Attenuation may be lower than the sound pressure of a single speaker here, which makes the direct sound distribution of the sound field more uniform. The horizontal direction of the sound column should not be "bunched", and there should be a large horizontal radiation angle so that the sound field can be more uniform in the left and right directions.
Sound column speakers usually refer to 4 ~ 10 paper cone speakers arranged in a line. The characteristic is that when transmitting sound in the horizontal direction, the radiation angle of the speaker is the same as that of a speaker, and when transmitting the sound in the vertical direction, the radiation angle of the speaker increases with the combination of speakers, especially for high-frequency sound. , The sound beam can come out in a certain direction.
The effect of vertical control of sound by a column speaker is quite effective. In a severe reverberation environment, the sound column speaker can effectively focus the sound to the listener, reducing the occurrence of bounce after passing to the wall.
The characteristic of a sound column is that it has strong directivity in the vertical direction. The longer the sound column, the narrower the sound beam, the more concentrated the energy, and the stronger the directivity. When the length of the sound column is fixed, the higher the frequency, the narrower the sound beam and the stronger the directivity.
Feature two: high sensitivity, long sound radiation distance
The sound column can be formed into various specifications according to different structures. The smaller the "sound disk" area, the stronger the beam focusing effect, the sharper the directivity, and the sensitivity on the axis is much higher than that of a single speaker. The acoustic axis efficiency of the sound column on the main axis is higher than that of a single speaker. Generally speaking, the larger the number of speakers that make up the sound column, the higher the sensitivity on the main axis and the longer the distance of sound radiation. Reasonably controlling the suspension height and depression angle of the sound column can make the sound field more uniform and clear. Because the total rated power of the sound column is several times that of a single speaker, and due to the focusing effect in the direction of the acoustic axis, the sensitivity is doubled, which is more effective for long-distance sound reinforcement.
The low-frequency radiation efficiency of the sound column is greatly improved compared with a single speaker, thereby increasing the low-frequency response and enriching the sound. By using the directional characteristics of the sound column, placing the microphone outside the main sound beam (that is, the sound is the lightest in the up and down directions at both ends of the sound column) and the weakest sound pressure can improve the howling phenomenon and increase the sound transmission gain. In places where the reverberation time is long, using the sound column can greatly improve the clarity of the sound.